Update:
I brought it to my local repair shop, and after taking a look at it (without prying it open) and from what I described to them, they guessed that it was a hardware issue. Was suggested I connect it to an external monitor, which I did. After hooking it up to a monitor, it shows that both the OS’s work, and I assume it is an issue with the display. There’s backlight, but only that. Any suggestions?